dangle a fish from the end of your tiller extension when you want to tack or gybe.

has always worked for me.

Personally, I feel that harnessing the pelicans with my striker is more effective. It might not be as fast as the dolphins, however, the pelicans provide more lift in my bows, and I avoid that nasty habit of dolphins to dive. Pelicans aren't very intelligent either, so they work for peanuts :P